2. If you looking for good wallet i recommend you blockhain. I am using him long time and it is the best for me. Low fee for transaction is very useful
Blockchain.info you mean?
There's actually no reason to use them because they have "low fees", they're basically a less secure, and less inclusive desktop wallet.
They are missing important features such as CPFP or RBF on transactions, so i'd say it is actually quite the opposite of offering "low fees".